package com.chixing.ih.util;

import java.io.UnsupportedEncodingException;
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;

/**
 * @author 刘岩
 * @version 1.0
 * @Desc Practice makes perfect
 * @date 2020/9/10 14:17
 */
public class EncryptUtil {
    /**
     * @param inputText
     * @param algorithmName md5和sha-1两种加密方式
     * @return
     */

    public static String encrypt(String inputText, String algorithmName) {
        if (inputText == null || "".equals(inputText.trim())) {
            throw new IllegalArgumentException("请输入要加密的内容");
        }
        if (algorithmName == null || "".equals(algorithmName.trim())) {
            algorithmName = "md5";
        }
        String encryptText = null;
        try {
            MessageDigest m;
            try {
                m = MessageDigest.getInstance(algorithmName);
                m.update(inputText.getBytes("UTF8"));
                byte s[] = m.digest();
                return hex(s);
            } catch (NoSuchAlgorithmException e) {
                e.printStackTrace();
            }

        } catch (UnsupportedEncodingException e) {
            e.printStackTrace();
        }
        return encryptText;
    }

    private static String hex(byte[] arr) {
        StringBuffer sb = new StringBuffer();
        for (int i = 0; i < arr.length; ++i) {
            sb.append(Integer.toHexString((arr[i] & 0xFF) | 0x100).substring(1,
                    3));
        }
        return sb.toString();
    }
}
